BM02 FFP1 Particulate Respirator Mask with Valve CE1463 EN149 20-Pack Protects against dust, dirt and oil-free air. Exhalation valve keeps your face cool and dry. M-shape nose clip for better comfort and fit. Starts to open even at low exhalation pressure, significantly reduces moisture and heat inside the mask. ActiveForm designed for long wearing comfort in hot, humid environments provides comfortable all-day wear. The flexible nose seal improves fit and provides optimum wearing comfort.